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Exploring the multi-router SOHO network

Exploring the multi-router SOHO network. draft-baker-fun-multi- router Fred Baker. Residential Network and Home Area Network Interaction. Imagine a high end home network: Audio/Video Wireless Telecommuting Home Area Network What is the HAN? Network connecting sensors in the home

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Exploring the multi-router SOHO network

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  1. Exploring the multi-router SOHO network draft-baker-fun-multi-router Fred Baker

  2. Residential Network and Home Area Network Interaction • Imagine a high end home network: • Audio/Video • Wireless • Telecommuting • Home Area Network • What is the HAN? • Network connecting sensors in the home • Communications with utilities • Services to residents “Home Area Network” ISP His Office Her Office A/V LAN Home Wireless

  3. Related to sensor networks for health… • Infrared • Motion sensors • EKG • Pedometers • … Health Network ISP His Office Her Office A/V LAN Home Wireless

  4. Add residential multihoming • Requirement in Japan • Typical residence typically has at least two ISPs • One serves IPTV only • One is for general internet access His Office Her Office A/V LAN Home Wireless

  5. We could do this all with one router(and my company would like to sell it to you) • My home is actually somewhat like this • Cisco 871/891 is not exactly free His Office Her Office Home Wireless A/V LAN

  6. Discussion in the draft • Issues • Routing in a small network • Assigning Subnet Numbers • Possible Requirements • Source/Destination Routing • Subnet assignment • Recommended upstream route

  7. Issue: Routing in a small network • If you go with the lower cost add-as-you-go model, you wind up with multiple routers • That implies some variation on routing within the home • Hiding your head under a rock is not a good solution to routing • What recommendations do we make? • RIPng? OSPFv3? IS-IS? BGP4+? Something else?

  8. Issue: Assigning Subnet Numbers • If you have multiple LANs, you wind up with multiple subnets • That implies some way to (zeroconf) assign subnet numbers • What recommendations do we make? • New protocol? • DHCPv6? Keyed off OSPF/IS-IS? • Netconf Network Management?

  9. Assigning Subnet Numbers • One way to do this might be to • Have ISP-facing router implement a DHCPv6 server to allocate subnets • Use OSPF/IS-IS to identify a significant (“designated”) router on each LAN • Designated router allocates subnet prefix from the DHCPv6 server • That’s an example • How should it be done?

  10. Exit Routing • The current IPv6 multihoming model calls for • Hosts, which have no knowledge of routing, select optimal source address • Routers, which have no semantic for the purpose, to route traffic to the right exit gateway • It would be nice if we had a way to do exit routing (comment made in shim6, applies here)

  11. Recommended upstream route • In routing, a router or network generally tells neighboring routers or networks what routes it might be able to handle • Japanese IPTV ISP only accepts traffic using its assigned source address and heading to it • Other ISPs will require use of their source address (BCP 38) and give access to other destinations • ISPs don’t generally exchange routing with residential customers • Would it be nice to configure a recommended upstream route using DHCPv6?

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